Multimedia card

Supported by the MultiMediaCard Association (MMCA), MultiMediaCards have the same surface but are 0.7mm thinner than SD cards and have two pins less. Hardware-wise MMC cards fit in SD card slots and many, but not all, SD devices and cameras will accept MMC cards as well. Check out the specs before you buy. Two variants are SecureMMC, similar to SD, and Reduced Size MMC.